Hello,

Usually [daily.cvd] file size comes around 45 MB but yesterday the file size was only 2.2 MB, is this genuine ?

ClamAV update process started at Sat Mar 19 03:30:01 2016
DON'T PANIC! Read https://www.clamav.net/support/faq
main.cvd is up to date (version: 57, sigs: 4218790, f-level: 60, builder: amishhammer)
Downloading daily.cvd [100%]
daily.cvd updated (version: 21467, sigs: 83892, f-level: 63, builder: amishhammer)
bytecode.cvd is up to date (version: 275, sigs: 45, f-level: 63, builder: amishhammer)
Database updated (4302727 signatures) from 10.1.1.7 (IP: 10.1.1.7)
Clamd successfully notified about the update.

Yes, it is probably a genuine download. The Clam AV team has compacted the database containing the signatures and migrated to a new signature interface.

Regards,